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� <br />TERRA ASSQCIATES, Inc. <br />Consultants in Geatechnical Engineering, Geology <br />and <br />Environmental Earih Sciences <br />� i � a-�-�� �,- <br />January 19, 2004 <br />Proj�ct No. T-5471 <br />UIr. Darren Peutrh <br />Intracorp <br />2505 Second �venue, Suite 300 <br />Seattle, Washington 9$121-1473 <br />Sub3ect: Supplementary Geotechnical Engineering Study <br />Seaway Tract 1, Lat 5 <br />�lerrill Creek Packway <br />Everett, Washing#on <br />Reference: Geoteci�nical Engineering Study, Seaway Tract l, Lot 5, dated September 23, 1998, <br />prepared by Earth Consultants, Inc. <br />Dear l�tr. Peugh: <br />As reg�ested, we have completed a supplementary geotechnical study for the subject project. To complete our <br />study, we reviewed existing soils data sumatiarized in the referexiced report, compl�ted a geologic reconnaissance <br />of the praperty to observe existing site and soil conditions, and hand excavated two shallow test borii�gs near the <br />northeast site comer in the vicinity of the proposed water c�uality pond. "This report summarizes the resuits ai our <br />study and provides geoteehnical engineering recommezzdatious tor project design and canstruction. <br />PROJECT DESCRIPTY�N <br />Ttie project will consist of constructing a light i.ndus�riallwarehause stn�cture with associated access, parking, and <br />utility improvements. The faotprint oi the structure will caver an area af ap�roximatety 23,000 square feet. <br />Grading to establish desired building elevations will iztvolve excavation approaching eight feet in f.h� <br />southwestern portion af the site, �vith fill degths of a similar magnitud� required towards the northeast building <br />and site cornezs. Vertical grade transitians created by the proposed grading will be faced with rackery <br />construction. Developmeat storulwater will be collected by a series of catch basins and transpor�ed to a watzr <br />quality pond tl�at wili be constructed at the base of #he slope ak the aortheask carner of the site. The pond will <br />require au excavation of about four ta five feet beIow current site grade in this area. The upgradient west side of <br />tbe pond excavation wi11 be faced witl� rockery construction, and a iwo- to three-foot i�i�h tzll containment berm <br />wili be constilicteci alang t}ie soutkxeast pond perimeter. <br />12525 Willow� Road, Suite 101, hirkland, Washington 98034 <br />Phone (425) 821-7777 • Fax (425} 821-4334 <br />